Average Temperatures for Wisconsin in September





Average temperatures for September at cities, communities and lakes throughout Wisconsin are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for each region of the state: Eastern Wisconsin, Southwest Wisconsin, Northern Wisconsin and the Lake Superior Shore.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern Wisconsin

Average September temperatures
High °F Low °F Place High °C Low °C
72 51 Appleton 22 10
69 44 Crivitz, High Falls Flowage 21 7
71 51 Fond du Lac 21 11
72 50 Green Bay 22 10
72 56 Kenosha 22 13
76 54 Lake Geneva 25 12
69 53 Manitowoc 20 12
70 51 Marinette 21 11
74 56 Milwaukee 23 14
73 53 Oshkosh 23 12
71 56 Racine 21 13
72 55 Sheboygan 22 13
69 51 Sturgeon Bay 21 10
68 51 Washington Island 20 10
73 51 Watertown 23 10
74 51 Whitewater 23 10

Southwest Wisconsin

Average daily temperatures in September
High °F Low °F Place High °C Low °C
74 50 Baraboo 23 10
72 50 Beaver Dam 22 10
71 50 Beloit 22 10
76 54 La Crosse 24 12
73 51 Madison 23 11
73 51 Platteville 23 11
74 52 Prairie du Chien 23 11
70 48 Viroqua 21 9
73 49 Wisconsin Dells 23 9
71 47 Wisconsin Rapids 22 8

Northern Wisconsin

September temperatures: daily averages
High °F Low °F Place High °C Low °C
68 48 Drummond 20 9
72 49 Eau Claire 22 10
67 47 Park Falls 20 8
67 45 Rest Lake, Manitowish Waters 20 7
68 45 Rhinelander 20 7
71 48 Rice Lake 22 9
71 49 River Falls 22 9
72 50 St Croix Falls 22 10
70 50 Stevens Point 21 10
70 49 Wausau 21 9
67 46 Willow Reservoir 19 8

Lake Superior Shore

Average September temperatures
High °F Low °F Place High °C Low °C
69 46 Ashland 21 8
68 48 Bayfield 20 9
67 47 Hurley 20 8
68 48 Madeline Island 20 9
67 50 Superior 19 10
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Wisconsin Temperatures
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